DATA IN THE CLASSROOM
INVESTIGATING EL NIÑO USING REAL DATA
2nd Edition (2017) This curriculum module was originally developed for the NOAA Ocean Data Education (NODE) Project by Caroline Joyce and Todd Viola under a contract with the National Marine Sanctuary Foundation. The 2nd edition (2017) was completed under contract by Amy Dean. Data in the Classroom is a collaboration of many NOAA programs and offices including: National Environmental Satellite, Data, and Information Service (NESDIS), National Estuarine Research Reserve System, National Oceanographic Data Center and the Office of National Marine Sanctuaries. Permission is hereby granted for the reproduction of these lessons without alteration and on the condition that the acknowledgment above is cited.
TABLE OF CONTENTS
Introduction…………………………………………………………………………………………………………………..…….3
El Nino Basics……………...………………………………………………………….………..………………..…….3
Curriculum Overview ……………………………………………………………….………………………..…….4
Science Standards and Ocean Literacy Principles………………………………………….…..…….5
Level 1……………………………………………………………………………………………………………………….…..…….6
Level 2……………………………………………………………………………………………………………………….…...…10
Level 3…………………………………………………………………………………………………………….…….………..…18
Level 4………………………………………………………………………………………………………………….…………….27
Level 5………………………………………………………………………………………………………………….………..….33
2 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
INTRODUCTION El Niño is an interesting and complicated phenomenon. Understanding how it works
requires looking at the interplay of a number of Earth's systems. This curriculum module is
designed to help students use real data to explore these systems and enhance their
understanding of the El Niño phenomenon. The curriculum is not designed to be a
comprehensive unit on El Niño, which is treated well in textbooks and other sources.
Rather, the focus is on data literacy as much as science, and the lessons are intended to
help achieve important cross-curricular connections between science and mathematics.
The U.S. Ocean and Coastal Observing System maintains numerous data sets that can be
used to study El Niño. This curriculum will deal primarily with two types of data that are
measured using satellite instruments: sea surface temperature and the concentration of
chlorophyll-a. The activities in this unit are organized as a pathway with five levels of
increasing sophistication. Students first need to understand how to access and interpret
sea surface temperature data, then how to identify and measure changes in temperature
over time. Along the way, they will learn how these changes relate to other physical
systems, specifically ocean circulation and the phenomenon of upwelling. Ultimately,
students will examine these relationships with respect to biological systems, using data on
chlorophyll as a measure of productivity. The goal is for students to become experienced
with these kinds of data and the tools for accessing them, so that, by the end of the
module, they can continue to explore data sets driven by their own inquiry.
El Nino Basics
El Niño is a set of phenomena caused by periodic changes in the ocean-atmosphere system
in the tropical Pacific Ocean. During El Niño, the trade winds, which usually blow warm
surface waters to the west, die down or even reverse. When the wind stops blowing the
warm water to the west, the warm water pools in the east, triggering a number of effects in
the atmosphere and ocean. The eastward movement of warm moist air, which follows the
warm water, can bring above-average rainfall to places like Peru, as well as changes in
atmospheric circulation. The warm water causes the air immediately above it to become
3 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
warmer than the surrounding air masses. This warmer air is less dense and rises. As the air
rises, it adiabatically cools. The cooling air reaches its saturation temperature, and the
moisture condenses, resulting in rain. In the ocean, meanwhile, the pooling of warm water
pushes warmer temperatures even deeper into the water column. This disrupts the normal
upwelling circulation that brings cold, nutrient-rich waters to the surface. Shutting off the
supply of nutrients results in a decline in primary productivity, which then impacts
organisms farther up the food chain.
Curriculum Overview
This curriculum module offers activities at five different levels of student interaction,
sometimes referred to as Entry, Adoption, Adaptation, Interactivity and Invention. Levels 1
and 2 are very directed and teacher driven. Levels 3-5 of Adaptation through Invention are
more student directed and open up opportunities to design lessons featuring student
inquiry. This chart illustrates the five levels of this module, Investigating El Niño Using Real
Data.
The levels also provide a natural opportunity for you to adapt and customize the
curriculum module as needed. For example, if students already have experience with the
topic, you may find that you can skip the entry level activities.
5 INVENTION: Designing Your Own Investigation – Students will design their own plan to answer a research question. They will describe how they will use data and consider the limitations of the data.
4 INTERACTIVITY: Relating SST to Productivity – Students will investigate the relationship between two different data sets by writing a hypothesis and examining it using real data.
3 ADAPTATION: Detecting El Niño – Students will apply data skills to a real problem – detecting an El Niño event. This activity uses guided inquiry and investigation design.
2 ADOPTION: Looking at SST Another Way – Students will examine another way of displaying temperature data in order to understand the benefits of different displays. This teacher-directed activity applies pre-existing models and provides practice reading data.
1 ENTRY: Reading Sea Surface Temperature – Students will learn how to read and interpret sea surface temperature (SST) maps. This is a teacher-led discussion and activity.
4 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Next Generation Science Standards (NGSS)
All Data in the Classroom modules follow guiding principles found in the Next Generation
Science Standards (NGSS)1. The standards are based on the notion of learning as a
developmental progression. The activities in each module can be incorporated into an
existing curriculum or unit of study to help address NGSS principles, core ideas, and
concepts for grades 6-8. You can learn more about how this module relates to specific
NGSS components by visiting the Data in the Classroom website.
Ocean Literacy Principles
This curriculum module also supports the following Essential Principles of Ocean Sciences.2
1. The Earth has one big ocean with many features.
c. Throughout the ocean there is one interconnected circulation system powered by wind, tides, the force of the Earth’s rotation (Coriolis effect), the Sun, and the water density differences. The shape of the ocean basins and adjacent land masses influence the path of circulation.
f. The ocean is an integral part of the water cycle and is connected to all of the earth’s water reservoirs via evaporation and precipitation processes.
2. The ocean is a major influence on weather and climate.
c. The El Niño Southern Oscillation causes important changes in global weather patterns because it changes the way heat is released to the atmosphere in the Pacific.
1 NGSS Lead States. 2013. Next Generation Science Standards: For States, By States. Washington D.C.: The National Academies Press. Next
Generation Science Standards is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards was involved in the production of, and does not endorse, this product.
2 Ocean Literacy Network (2005). Ocean Literacy - The Essential Principles of Ocean Sciences K-12. Washington, D.C.
5 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
LEVEL 1: ENTRY READING SEA SURFACE TEMPERATURE
SUMMARY
● Grade Level: 6-8
● Teaching time: 45 minutes
● Activities: a) identify locations on a map using latitude and longitude and b) use a false-color map to read sea surface temperature at specific locations.
● Vocabulary:
○ El Niño: a set of phenomena caused by periodic changes in the ocean-atmosphere system in the tropical Pacific Ocean.
○ Sea surface temperature (SST): the average temperatures at the uppermost layer of the ocean – only a few millimeters deep.
○ False color map: an image that uses colors to represent differences in measured values, rather than true appearance.
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LESSON PLAN – LEVEL 1
Objectives
Students will learn how to read and interpret sea surface temperature maps.
Background
One of the ways to detect an El Niño event is to look at sea surface temperature (SST). SST
can be recorded using instruments on satellites that measure heat from the surface of the
ocean. This data can be represented on maps in different ways. One way scientists do this
is to plot different temperature values with different colors, producing what is called a
false-color map.
Materials
● Projector
● Computers and internet access
Teacher Prep
There are a variety of ways to implement this activity. Decide which works best for your
classroom, and prepare as appropriate.
Option 1: Using the online activity
● Go the the Data in the Classroom website and familiarize yourself with the Level 1
activities.
● If your students have computers and internet access, you may choose to have them
complete the online student activities during this lesson.
Option 2: An alternative to the online activity
● If you do not have internet access in your classroom, you can alternatively download
the PowerPoint (PPT) slides from the Teachers Guide page of the online activity. The
PPT contains the same color maps and images from the online activities in Level 1.
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Project the images from Level 1 to guide students through Parts 1 and 2 of this
lesson. Note: Part 3 cannot be completed without access to the internet.
Procedure
Part 1: Understanding False Color Maps
Before students can start using data to understand and detect El Niño events, they need to
learn how to read sea surface temperature (SST) maps.
1. Working at a computer, students should navigate to Level 1 of the Understanding El
Niño module.
2. Project Level 1 onto a screen to help guide students through the activity.
3. Scroll down to the section titled ‘Understanding False Color Maps.’ Here, you’ll find a
map displaying sea surface temperature measurements (SST) from space. This type
of map, called a false color map, uses a variety of colors to represent different
temperature measurements across the Pacific Ocean.
4. Using the projected image, discuss the key features of the map:
● The map displays information about sea surface temperature taken from
instruments onboard satellites orbiting the earth (during December 2015).
● The geographic area of the map is defined using lines of latitude and
longitude.
○ X axis = longitude, degrees east and west.
○ Y axis = latitude, degrees north and south of the Equator.
● The land areas on the map are colored gray.
● The Pacific Ocean is colored various shades of red and blue. The colors
represent temperature at the ocean’s surface.
● Locate the color legend on the map, and click the information icon to display.
This legend indicates the surface water temperature in degrees Celsius.
● Ask students what color indicates the warmest water (dark red) and the
coldest water (dark blue) on the map.
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5. Give students time to answer the questions at the end of this section.
Answer - Question 1: Degrees north and south of the equator
Answer - Question 2: 26 °C
Part 2: Comparing Change Over Time
Now that students can read a sea surface temperature (SST) map, they can compare
temperature data from one year to the next.
1. Scroll down to the next section titled ‘Comparing Change Over Time.’ Here, you’ll
find two SST maps. On the left is a map from December 1990, and on the right is a
map from December 1991.
2. Ask: How are the maps alike and how are they different? Hint: Look at the size of the
areas of high temperature.
3. Discuss these questions: How can using satellite data help researchers to study
water conditions over time? Why is it important for researchers to look at data for
more than one year to determine sea surface temperature change?
4. Give students time to answer the question at the end of this section.
Answer - Question 3: D. Answer A and C
Part 3: Explore More Data
Once students are comfortable reading maps, they can explore changes in SST over short
and long periods of time by running a time series animation.
1. Scroll down to the final section in Level 1 titled ‘Explore More Data.’
2. Ask students: After analyzing the December 1991 map above, what do you think a
map from June 1992 should look like? Students can adjust the sliders and playback
speed as desired and play the animation.
3. Ask students to share their observations: for example, students may have observed
that the warmer band of water shifts northward in the summer months and
southward in winter months.
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LEVEL 2: ADOPTION LOOKING AT SST ANOTHER WAY
SUMMARY ● Grade Level: 6-8
● Teaching time: 45 minutes
● Activities: a) Interpret a graph of sea surface temperature data along a single line of latitude and b) examine the relationship between data displayed on a map and on a latitude line graph.
● Vocabulary:
○ Latitude line graph: a plot of data along one line of latitude from west to east.
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LESSON PLAN – LEVEL 2
Objectives
Students will explore two different ways sea surface temperature (SST) data can be
represented and describe the advantages of both displays.
Background
Researchers use satellites to collect data and provide “snapshots” of sections of the ocean.
During an El Niño event, it is important to have different tools to understand how SST
changes. In the last activity, students used maps displaying SST over a large surface area in
the Pacific Ocean. Now students are asked to look at that same data, but this time using a
graph along a single line of latitude from west to east. This kind of graph displays finer
details and can make it easier to see and measure relative differences in SST. Students
should know how to use both the map and the graph, because both are useful for
interpreting data and understanding an El Niño event.
Materials
● Projector
● Computers and internet access
● Photocopies of student worksheet (optional)
● Ruler (if using the student worksheets)
Teacher Prep
There are a variety of ways to implement this activity. Decide which works best for your classroom, and prepare as appropriate.
Option 1: Using the online activity
● Go the the Data in the Classroom website and familiarize yourself with the Level 2
activities.
11 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
● If your students have computers and internet access, you may choose to have them
complete the online student activities during this lesson.
Option 2: An alternative to the online activity
● If you do not have internet access in your classroom, you can alternatively download
the PowerPoint (PPT) slides from the Teachers Guide page on the website. The PPT
contains the same color maps and images from the online activities in Level 2.
Project the images from Level 2 to guide students through the lesson.
● Print the student worksheet at the end of this lesson.
Procedure
Part 1: Graphing Sea Surface Temperature Measurements
1. Working at a computer, students should navigate to Level 2 of the Understanding El
Niño module.
2. Project Level 2 onto a screen to help guide students through the activity.
3. Scroll down to the section titled ‘Graphing SST Measurements.’ Here, you’ll find a
line graph of sea surface temperature data during December 2015. This type of
graph, called a latitude line graph, displays temperature along one line of latitude, in
this case along the equator.
4. Ask students: What are the units along the X and Y axes? Make sure they understand
the difference between degrees of temperature and degrees of latitude/longitude.
Answer: X axis = longitude, degrees east and west, Y axis = monthly average sea
surface temperature in degrees Celsius.
5. With students, practice reading data values from the graph. Example: What was the
monthly average sea surface temperatures along 0° latitude at 165°E?
Answer: 29 °C
6. Give students time to answer Question 1, completing either the online chart (or the
identical table on the student worksheet). Students should use decimals to
represent fractional values where appropriate.
Answers to Question 1: 28.6 °C, 30.0 °C, 27.6 °C, 23.6 °C
12 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Part 2: Understanding Maps and Graphs
1. Scroll down to the next section titled ‘Understanding Maps and Graphs.’ Here, you’ll
find a map and graph both displaying sea surface temperature. The upper image
shows the SST map for December 2010. Notice the ‘transect’ line across the equator.
The graph below shows SST data for December 2010 along the equator (indicated
by the transect line on the above map).
2. Give students time to answer Question 2 and complete the online chart (or the
identical table on the student worksheet).
Answers to Question 2 - SST map: answers will vary
Answers to Question 2 - SST graph: 30.0 °C, 27.0 °C, 24.4 °C, 21.0 °C
3. Ask students to compare the results they obtained using the map and line graph.
Discuss any differences. Ask: Is one of the data sources wrong? What are some
advantages and disadvantages of using maps versus graphs to display the same
temperature data?
Answer: Maps can display data patterns over large areas, but often with less detail
or resolution than graphs. Graphs represent a “slice” of data along a line, but can
show smaller variations.
4. Give students time to answer Question 3 at the end of this section.
Answer to Question 3: A map can help to explain data patterns over large areas.
Using the Get Data tool
If your students have access to computers and the internet, you may challenge them to
make their own sea surface temperature graphs using the ‘Get Data’ tool. Brief instructions
are below. More detailed instructions can be found on the Get Data page of the
Understanding El Niño online activity.
a. Which timespan? Select ‘monthly’
b. Specify a date: Select the desired month and year
13 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
c. Bounding Box: Move and resize the red box on the map by clicking and
dragging the edges. For example, students may resize the box to include
southern Alaska, Australia and the west coast of South America.
d. Select an output format: Leave the default selection, “download image.’
e. Click ‘Download’
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STUDENT WORKSHEET – LEVEL 2
Graphing Sea Surface Temperature Measurements
Sea Surface Temperature at the Equator, December 2015
Instructions: Examine the line graph showing sea surface temperature at the equator.
Below the graph is a reference map showing an area of the Pacific Ocean. The line running
west to east is the area represented by the data on the graph.
Question 1: What were the monthly average sea surface temperatures along 0° latitude at
these locations? Fill in the chart below.
Longitude 140° E 180° 140° W 100° W
SST
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STUDENT WORKSHEET – LEVEL 2
Understanding Maps and Graphs
Sea Surface Temperature Across the Pacific Ocean, December 2010
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The map on the previous page shows sea surface temperature (SST) for December 2010.
Notice the ‘transect’ line across the equator. Below the map is the corresponding line graph
of sea surface temperature at the equator.
Instructions:
● Locate 140° E along the x-axis of the line graph. Using a ruler, draw a vertical line
from this point on the line graph to the above map, along the same 140° E line of
longitude. End the line at the transect (the Equator). Repeat - drawing these same
connecting lines between the map and graph at 180°, 140° W and 100° W.
● On the map, use the colorbar to estimate the values of temperature at each line of
longitude. Enter your temperature estimates in the chart below. Repeat the same
process with the graph.
Longitude 140° E 180° 140° W 100° W
SST from map
SST from graph
Question 2: Compare your results using the map and the line graph. Are they exactly the
same? If not, explain why you may have obtained different results.
Question 3: What is one advantage of using a map over a line graph? Circle the answer.
A) A map can help determine precise data along a line of latitude.
B) A map can help to identify data patterns over large areas.
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LEVEL 3: ADAPTATION DETECTING EL NIÑO
SUMMARY ● Grade Level: 6-8
● Teaching time: Two 45-minute periods
● Activities: a) generate maps and graphs of sea surface temperature data and b) use data to distinguish between an El Niño and 'normal' SST conditions.
● Vocabulary:
○ Trade winds: wind systems occupying most of the tropics, which blow from approximately 30 degrees North and South of the equator. The winds blow from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere.
○ Thermocline: water layer with a large change in temperature with depth.
○ Upwelling: movement of nutrient-rich water to the surface.
18 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
LESSON PLAN – LEVEL 3
Objectives
Students will apply map and graph skills learned in earlier levels to a real problem —
identifying an El Niño event.
Background
During a typical year, the trade winds that blow across the Pacific Ocean push warm
surface water to the west. On a typical sea surface temperature graph (Figure 1), the
surface water in the western Pacific is warmer than in the eastern Pacific. But periodically,
this pattern changes. The trade winds die down or even reverse, and water temperatures in
the east become warmer than usual. This change in wind patterns is the beginning of an El
Niño.
This change can be seen by looking at a plot of sea surface temperature from west to east.
During a ‘normal’ year, the temperature difference between warm water in the west and
cooler water in the east is evident in the slope of the line (Figure 1).
Figure 1: Sea surface temperature during a Figure 2: Sea surface temperature during ‘normal’ year, Dec 1990. an El Niño year, Dec 1991.
19 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
During an El Niño year, the area of high temperature can be seen extending farther to the
east than in a typical year (Figure 2). The temperature difference from west to east may
also be smaller.
The shift in temperature has an important effect on ocean circulation. Usually, cold water
from the bottom of the ocean rises to the top in the eastern Pacific to replace the surface
water that the trade winds have blown to the west. This rising of cold water to the surface
is called upwelling, and is important because it brings nutrients from deeper water up to
the surface. Cold deep water is separated from warm surface water by a layer called the
thermocline. During El Niño, this thermocline shifts, disrupting the normal transport of
cold, nutrient-rich water.
Materials
● Projector
● Computers and internet access
● Photocopies of student worksheet
Teacher Prep
● Go the the Data in the Classroom website and familiarize yourself with the Level 3
activities.
● Practice generating maps using the data tool. Be prepared to demonstrate the data
tool for students. The steps are described in the section below.
Procedure
Introduction to El Niño
1. Navigate to Level 3 of the Understanding El Niño online activity. Using a projector,
play the El Niño animation and discuss what is going on.
○ In a typical year, trade winds cause warm surface water to accumulate in the
western Pacific Ocean.
○ The movement of warm water to the west allows cooler, nutrient-rich water
to rise to the surface in the east. This is called upwelling.
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○ During El Niño, the trade winds relax or even reverse. Notice the change in
the arrows that represent the trade winds. Since the warm surface waters
are not transported to the west, the eastern Pacific Ocean becomes warmer
than usual.
○ This change, in turn, pushes the Eastern Pacific thermocline between warm
surface water and cooler deep water farther down in the water column. This
disrupts the usual upwelling of cold, nutrient-rich water to the surface.
2. You can find additional resources to help introduce El Niño to your students in the
Teacher Guide section of the online activity.
Part 1: Graphing El Niño
1. Working at a computer, students should navigate to Level 3 of the Understanding El
Niño online activity.
2. Project Level 3 onto a screen to help guide students through the activity.
3. Scroll down to the section titled ‘Graphing El Niño.’ Here, you’ll find two line graphs
displaying temperature at the equator across the Pacific Ocean. Students should
examine the temperature graphs during a ‘normal’ year and an El Niño year.
4. Ask students: What are the different characteristics of a normal year? Of an El Niño
year?
Answer: During a ‘normal’ year, the temperature is about 8 °C warmer in the
western Pacific (off the coast of Asia) than in the eastern Pacific. The temperature
difference between the west and the east is evident in the slope of the line. During
an El Niño year, the water in the eastern Pacific is warmer than normal, the
temperature difference from west to east may be smaller, and the area of high
temperature can be seen extending farther to the east than in a typical year.
3. Give students time to scroll down the page and answer the Check Your Understanding
questions. Remind students to click each ‘Question’ to display a new image.
Answer - Question 1: A
Answer - Question 2: B
Answer - Question 3: B
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Part 2: Answering a Question with Data
1. Pair up students into teams and give each team a copy of the student worksheet,
Answering a Question with Data.
2. Review the mission and hypothesis on the worksheet. Tell student teams they must
design a plan to use real data to answer the question.
3. Next, explain what types of data are available to them: sea surface temperature
maps and graphs from any year after 1981. You may want to review the advantages of
disadvantages of using maps versus graphs, from Level 2.
4. Demonstrate how to access a map: using a projector, scroll down to the next section
titled ‘Answering a Question with Data.’ Here you’ll find a data tool that will enable
students to create a sea surface temperature map.
a. Which timespan? Select ‘monthly’
b. Specify a date: Select the desired month and year
c. Bounding Box: Move and resize the red box on the map by clicking and
dragging the edges. For example, students may resize the box to include
southern Alaska, Australia and the west coast of South America.
d. Select an output format: Leave the default selection, “download image.’
e. Click ‘Download’
5. Other than maps, students should strongly consider using line graphs to answer the
question. Students can access line graphs in two ways. The simplest option is to use
the graphs at the end of this lesson. Alternatively, students can make their own
graphs using the data tool and a spreadsheet program such as Microsoft Excel. If
desired, demonstrate how to use the tool to create a line graph or watch this video.
a. Which timespan? Select ‘monthly’
b. Specify a date: Select the desired month and year
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c. Bounding Box: To access SST data along the equator, input the exact latitude
and longitude below.
Upper-Left Latitude: 0
Upper-Left Longitude: 125
Lower-Right Latitude: 0
Lower-Right Longitude: -80
d. Select an output format: Select “download file’
e. Click ‘Download’
f. Open the file in an application such as Microsoft Excel and generate a line
graph.
6. Once students understand what data is available to them, they will need to decide
exactly what data is needed to answer the question. Will they need sea surface data
from multiple years (e.g. December 2014, 2015 and 2016)? Will they need maps, or
graphs or both?
7. After accessing and reviewing their data, students should write a detailed
interpretation of what their data shows and complete the conclusion statement at
the end of the worksheet.
8. Students can check to see if their conclusion was correct by answering the Check
Your Understanding question at the end of Level 3. Answer - Question 4: Yes
9. Successful data interpretations and conclusions may include the following:
a. A working definition of El Niño.
b. A comparison of data from more than one year.
c. A description of characteristics of an El Niño year and a non-El Niño year.
d. A discussion of how the temperature data found relates to the schematic
diagram of El Niño.
e. An explanation of how data can be graphed to illustrate information visually.
23 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
STUDENT WORKSHEET – LEVEL 3
Answering a Question with Data
Your mission: It’s the winter of 2015. The
water along the coast of California is
unusually warm. Tiny red crabs that are
typically common in the warm waters of
Mexico are now washing up along beaches
of California. Are these observations the
result of an El Niño? Your mission is to find
out - using data.
Red crabs, common in Mexico, washed ashore in CA.
Question: Did an El Niño event occur during the winter of 2015-2016?
Make a Plan: Make a list below of the specific TEMPERATURE data you will need to answer
the question. Hint: can you answer the question by looking at data from only one year? Will you
need maps, graphs or both?
Data Set Date Map or Graph?
Example: Sea surface temperature December 2001 map
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Get the data: Use the website to download the data you need.
Need a line graph, but not sure how to make them with the data tool? You can find sea surface
temperature graphs from years 2014-2016 on the following page.
Interpret the data: What does your data show? Be specific and descriptive.
___________________________________________________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
Draw a Conclusion: Did an El Niño event occur during the winter of 2015-2016? __________
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REFERENCE DATA
Sea Surface Temperature at the Equator, December 2014
Sea Surface Temperature at the Equator, December 2015
Sea Surface Temperature at the Equator, December 2016
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LEVEL 4: INTERACTIVITY RELATING SST TO PRODUCTIVITY
SUMMARY ● Grade Level: 6-8
● Teaching time: Two 45-minute periods
● Activities: a) Examine the relationship between sea surface temperature and chlorophyll data and b) use real data to understand a problem: how El Niño affects the food chain in the oceans.
● Vocabulary:
○ Chlorophyll: green pigment in the cells of many plants that enables them to use sunlight to convert carbon dioxide and water into carbohydrates in the process called photosynthesis.
○ Phytoplankton: microscopic floating plants that perform photosynthesis and provide many of the nutrients for life in the ocean.
○ Productivity: the rate per unit area or per unit volume at which producer organisms produce food for other organisms.
27 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
LESSON PLAN – LEVEL 4
Objectives
Students will examine the relationship between SST and chlorophyll a to understand how El
Niño affects productivity in the ocean.
Background
Phytoplankton are microscopic plants that live near the surface of the ocean and provide
food for larger organisms. They form the base of the food chain. Nutrients carried by
upwelling from deeper water up to sunlit surface water encourage phytoplankton growth.
This process can be compared to the addition of fertilizers to soil to encourage land plants
to grow faster and larger.
Phytoplankton also contain chlorophyll, which enables them to use photosynthesis.
Scientists estimate the amount of phytoplankton in the ocean by using data from satellites
that can detect chlorophyll by color.
During an El Niño, when upwelling is disrupted, scientists measure a decrease in
chlorophyll in areas of the eastern Pacific. This signals a decline in phytoplankton
productivity.
Materials
● Projector
● Computers and internet access
● Photocopies of student worksheet
Teacher Prep
● Go the the Data in the Classroom website and familiarize yourself with the Level 4
activities.
● Practice generating SST and chlorophyll maps using the ‘Get Data’ tool on the
website. Be prepared to demonstrate the data tool for students.
28 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Procedure
This activity challenges students to think like scientists by designing a scientific
investigation in which data collection and analyses are important parts of the process.
Students are challenged to engage in a number of scientific practices, including using real
data to answer a question.
Introduction to Phytoplankton
1. Project Level 4 onto a screen to help guide students through the activity.
2. Introduce the activity to students by explaining that they will be looking at an
important problem – how El Niño affects the food chain in the oceans.
3. Define and discuss phytoplankton, using the image in the introductory section of
Level 4. Students should know what phytoplankton are, why they are important, and
how scientists estimate the amount of phytoplankton in the ocean (using satellites).
Point out the green colored chlorophyll in the cells. Explain that, although tiny,
phytoplankton can bloom in such large numbers that they can change the color of
the ocean. Satellites can measure these large-scale color changes from space.
Part 1: Measuring Phytoplankton from Space
1. Working at a computer, students should navigate to Level 4 of the Understanding El
Niño online activity.
2. Scroll down to the section titled ‘Measuring Phytoplankton from Space.’ Here, you’ll
find a satellite map showing chlorophyll concentrations across the ocean. Measuring
chlorophyll from space allows us to identify areas of the ocean that are rich in
nutrients and phytoplankton. Encourage students to examine unknown data, and
use skills and techniques they learned in prior levels to read and interpret that data.
4. Give students time to answer the Check Your Understanding question at the end of
this section.
Answer - Question 1: High levels of nutrients and plankton
5. Ask students: “Why does the California coastline have much higher chlorophyll
concentrations than other parts of the ocean?
29 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Answer: Upwelling brings up cold, nutrient-rich waters to the surface, which support
blooms of phytoplankton.
Part 2: Disrupting Ocean Productivity
1. Scroll down to the next section titled ‘Disrupting Ocean Productivity.’ Here, students
will be challenged to use data to draw connections between sea surface
temperature, upwelling and chlorophyll concentrations.
2. Students should examine the two maps, side by side, and examine the differences
in sea surface temperature. They may recall, from Level 3, that during El Niño the
normal upwelling of cold, nutrient-rich water is disrupted and the water along the
eastern Pacific becomes warmer.
3. Give students time to answer the Check Your Understanding questions at the end of
this section. Remind students to click each ‘Question’ to display a new image.
Answer - Question 2: Right map
Answer - Question 3: Left map
Part 3: Research Project – Exploring El Niño and Chlorophyll Data
1. Scroll down to the next section titled ‘Research Project.’ Here you’ll find instructions
and a defined question for students to answer using real data.
2. Explain to students that they will be investigating the effect of an El Niño on the
ocean food chain along the coast of California.
3. Assign students to work in teams of two and give each team a copy of the Student
Worksheet, Research Project: Exploring El Niño and Chlorophyll Data.
4. Review the question and ask student teams to complete the hypothesis.
5. Working at a computer, students should scroll down to the next section, Testing a
Hypothesis with Data, and use the data maps and graphs to complete the questions
and table on their worksheet.
6. Students can check to see if their conclusions were correct by answering the Check
Your Understanding questions at the end of the section.
Answer - Question 4: 2009
Answer - Question 5: SST increases and chlorophyll decreases along the equator
during El Niño years.
30 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
STUDENT WORKSHEET – LEVEL 4
Research Project: Exploring El Niño and Chlorophyll Data
Your mission: You have joined a team of
scientists who are studying the effects of El
Niño on biological systems in the ocean.
Specifically, you are interested in the
relationship between sea surface
temperature (SST) and productivity, as
measured by the amount of chlorophyll.
Your task is to determine if there is a
relationship between sea surface temperature and the distribution of phytoplankton, and,
if so, how this relationship is impacted during El Niño. The team has decided that you will
compare two time periods: December 2009 and December 2010.
1. Form a hypothesis: Form a hypothesis to answer the research question below:
Research Question: Is there a relationship between sea surface temperature and
the distribution of phytoplankton? If so, how is this distribution impacted during El
Niño?
Hypothesis: During an El Niño event, when sea surface temperatures in the eastern
Pacific ocean increase, the amount of phytoplankton, as measured using
chlorophyll-a, ___________________________ (fill in).
2. Test Your Hypothesis with Data: In order to test your hypothesis, closely observe the
data maps and graphs presented in the Level 4 online activity, Understanding El Niño.
Record your observations and analyze your data on the following page.
31 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Compare the DATA MAPS for 2009 and 2010.
1. Which year shows warmer sea surface temperatures in the eastern Pacific (near the
equator)? ___________________
2. Which year shows higher chlorophyll concentrations in the eastern Pacific (near
Mexico City)? _______________
Compare the GRAPHS for 2009 and 2010. Complete the table below.
Date: 2009 Date: 2010
Latitude Longitude SST Chlorophyll SST Chlorophyll
0° 140° E
0° 180°
0° 140° W
0° 100° W
3. Interpret the data: Answer the questions below.
3. Which is the El Niño year? Which is the non-El Niño year?
4. Can you see any patterns between SST and chlorophyll distribution?
5. Describe the pattern of SST and chlorophyll distribution during an El Niño year.
6. Describe the pattern of SST and chlorophyll distribution during a non-El Niño year.
4. Draw conclusions:
7. Was your hypothesis supported?
8. Based on your analyses of the data, how would you describe the relationship
between El Niño, SST, and chlorophyll concentration?
32 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
LEVEL 5: INVENTION DESIGN YOUR OWN INVESTIGATION
SUMMARY ● Grade Level: 6-8
● Teaching time: Three 45-minute periods
● Activity: Design an investigation and use real data to answer a question.
33 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
LESSON PLAN – LEVEL 5
Objectives
Students will design an investigation using real data on El Niño to try to answer a research
question of their choosing.
Background
Students have used real data to begin to understand the phenomenon of El Niño, but they
can learn a lot more from exploring this data. In this level, students will design an
investigation using real data on El Niño to try to answer a research question of their
choosing. In reporting the outcome of their research, they must state what they have
learned from the investigation, and use sufficient evidence to evaluate and answer their
question.
For decades, satellite instruments have reliably monitored atmospheric and ocean
conditions that help scientists better understand El Niño. The research questions that
students select will help them consider this data over time, and perhaps lead them to offer
their own predictions about future El Niño events. In this activity, students should be
encouraged to develop their own research questions and hypotheses.
Materials
● Projector
● Computers and internet access
● Photocopies of student worksheet
Teacher Prep
● Go the the Data in the Classroom website and familiarize yourself with the Level 5
activities, sample questions, graphs and data tools.
● Practice generating SST and chlorophyll maps using the data tool in Level 5. Be
prepared to demonstrate the tool for students.
34 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Procedure
This activity challenges students to think like scientists by designing a scientific
investigation in which data collection and analyses are important parts of the process.
Students are challenged to engage in a number of scientific practices, including asking
questions, analyzing data and constructing explanations using data.
1. Assign students to work in teams of two and give each team a copy of the Student
Worksheet, Design Your Own Investigation.
2. Project Level 5 onto a screen and scroll down to the section titled ‘Plan Your
Investigation.’ Locate the list of data tools.
3. Prior to developing a question, students will need to understand what types of data
are available to them. The three types of data tools and graphs that are available in
Level 5 are described below. With students, discuss these data and demonstrate
how to use the data tools, if needed.
a. Graph of the El Niño Historical Index (1950 - 2016): This graph can be used to
compare strength and frequency of El Niño events over time.The El Niño
Index is the standard index that NOAA uses to identify El Niño and La Niña
events in the tropical Pacific. El Niño events are characterized by index values
of 0.5 or greater.
b. SST and Chlorophyll Data Tool (1981 - present): This data tool will enable
students to create sea surface temperature and chlorophyll maps. Students
may also make their own graphs using the data tool and a spreadsheet
program such as Microsoft Excel. Instructions to use the tool can be found by
clicking the ‘Get Data’ tab in the upper navigation bar.
c. NOAA View Global Data Explorer: This tool allows students to explore a
variety of NOAA datasets. For instructions, click the text that reads “NOAA
View Global Data Explorer. Then click ‘Watch a Video Tour’ located at the
bottom right side of the page.
35 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
4. Guide student selection of a research question (or have them make up their own)
that is appropriate to their academic experience. Two sample questions are
highlighted in the online Level 5 activities:
Sample question 1: Are Are El Niño events becoming stronger over time?
Sample question 2: Are El Niño events becoming more frequent?
5. Next, in their small groups, students should determine what data are needed to
answer their question, making a list on their worksheet.
6. Using the data tool on the website, students can then access, save and/or print the
graphical displays of data. If necessary, help students determine if they have enough
data to answer their question and identify areas where they may need to seek out
additional sources of information.
7. After accessing and reviewing their data, students should work together to write a
detailed interpretation of what their data shows and complete the conclusion
section at the end of the worksheet.
8. After students complete their research, provide time for them to present their
findings to the class.
9. Use student presentations as an opportunity to relate their investigations to current
news and information about El Niño and global climate change. Ask: From your own
experience looking at real data, how do you view the question of global climate
change?
36 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
STUDENT WORKSHEET – LEVEL 5
DESIGN YOUR OWN INVESTIGATION
Develop Your Question:
___________________________________________
___________________________________________
___________________________________________
___________________________________________
Make a Plan: Make a list below of the specific data you will need to answer the question.
Data Set Date Map or Graph?
Example: Sea surface temperature December 2015 map
Other than the data listed above, what other information (if any) will you need to answer
your question?
_____________________________________________________________________________________________
_____________________________________________________________________________________________
37 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE
Get the data: Use the website to download the data you will need.
Interpret the data: What does your data show? Be specific and descriptive.
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
Draw a Conclusion: What is the answer to your question? Use evidence and data to support
your conclusion.
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
38 INVESTIGATING EL NIÑO USING REAL DATA: TEACHER GUIDE